Thermocapillary motion of hybrid drops

Abstract

Hybrid drops are composed of two or more immiscible phases. They occur in various natural and technological processes and environments, e.g., the atmosphere, liquid membranes, and liquid bilayers and direct-contact heat and phase separation processes. In this work we have studied the dynamics of an axisymmetric hybrid drop in an infinite viscous domain. The drop moves under the influence of the Marangoni effect due to an arbitrarily imposed temperature field. In the classical case of a constant temperature gradient, it was found that in general the motion is induced in the direction of the temperature gradient. However, under certain physical conditions and drop geometry, motion against the temperature gradient is obtained.